Define Eurocopter X-3.
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The Eurocopter X³ is an experimental high-speed compound helicopter developed by Airbus Helicopters. A technology demonstration platform for "high-speed, long-range hybrid helicopter" or H³ concept, the X³ achieved 255 knots in level flight on 7 June 2013, setting an unofficial helicopter speed record.
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The Eurocopter X³ is an experimental high-speed compound helicopter developed by Airbus Helicopters. A technology demonstration platform for "high-speed, long-range hybrid helicopter" or H³ concept, the X³ achieved 255 knots
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